What is the volume occupied by 2.5 mol of ammonia gas at STP?

What is the volume occupied by 2.5 mol of ammonia gas at STP?
  1. $22.4 \mathrm{dm}^3$
  2. $25.0 \mathrm{dm}^3$
  3. $33.6 \mathrm{dm}^3$
  4. $56.0 \mathrm{dm}^3$

Solution

1 mole ammonia at STP occupies $22.4 \mathrm{dm}^3$ $\begin{aligned} \therefore \quad 2.5 \text { mole occupies } 2.5 \mathrm{~mol} \times & 22.4 \mathrm{dm}^3 \mathrm{~mol}^{-1} \\ & =56.0 \mathrm{dm}^3 \end{aligned}$

Asked in: MHT CET 2024 (15 May Shift 2)

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